Code examples and extended information

For more information about the Waspmote hardware platform go to:

http://www.libelium.com/waspmote

http://www.libelium.com/development/waspmote

In the Waspmote Development section you can find complete examples:

http://www.libelium.com/development/waspmote/examples

Example:

/*         ------ [RS-485_03] Configuration Example --------
 *  
 *  This sketch shows the use of the RS-485 standard, and the use
 *  of the main functions of the library. This standard defines
 *  the electrical characteristics of drivers and receivers for
 *  use in digital systems. It does not specify or recommend any
 *  communications protocol. For a complete communication
 *  protocol, please see the Modbus examples.
 *  
 *  Copyright (C) 2014 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details. 
 *  
 *  You should have received a copy of the GNU General Public License 
 *  along with this program. If not, see <http://www.gnu.org/licenses/>.
 *  
 *  Version:          0.1
 *  Implementation:   Ahmad Saad
 */

//Include always this library when you are using the RS-485 functions 
#include <Wasp485.h>

//Number of retires
uint8_t retries = 0;
uint8_t result = -1;

void setup()
{
// Power on the USB for viewing data in the serial monitor
	USB.ON();
	delay(100);

	// Powers on the module and assigns the SPI in socket0
	while ((result !=0) & (retries < 5))
	{
		retries ++;
		result = W485.ON();
		delay(1000);
	}

	if ( result == 0)
	{
		USB.println("RS-485 module started successfully");
	}
	else
	{
		USB.println("RS-485 did not initialize correctly");
	}

	delay(100);

	// Configure the baud rate of the module
	W485.baudRateConfig(9600);

	// Configure the parity bit as disabled
	W485.parityBit(DISABLE);

	// Use one stop bit configuration
	W485.stopBitConfig(1);

	W485.transmission(ENABLE);
	delay(250);
	W485.send("Waspmote RS-485 module connected to the network");

	delay(250);
	// Disables the transmission
	// Useful when sniffing the bus
	W485.transmission(DISABLE);
	delay(250);

	//Print hello message
	USB.println("Hello, this is RS-485 communication configuration example");
}


void loop()
{
	// Sniffing the bus. All data will be printed in the serial monitor.
	// If data in response buffer
	if (W485.available())
	{
		while (W485.available())
		{
			// Read one byte from the buffer
			char data = W485.read();
			// Print data received in the serial monitor
			USB.print(data ,BYTE);
		}

		USB.print("\n");
	}

	delay(1);
}